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Q.
Find equilvalent resistance between $ X $ and $ \text{Y} $ :
Rajasthan PMTRajasthan PMT 2001
Solution:
The given circuit can be shown in the following way. No current will be flown in the middle resistance.
Equivalent resistance of $R$ and $R'=2R$
Total resistance $\frac{1}{R'}=\frac{1}{2 R}+\frac{1}{2 R}$
$R'=R$
